Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Volvo XC90 R-Design, AWDFACTORY OEM SERVICE PROCEDURE
Audio Control Module (Cable Between The Audio Module And The Cd Changer/Navigation Unit)
Before taking any readings, see CHECKING VOLTAGE / GROUND CONNECTION, MEDIA/INFOTAINMENT .
| Control module terminal | Breakout box terminal | Signal type | Ignition on | Miscellaneous |
|---|---|---|---|---|
| E1 | #16 | Clock signal to audio unit | Digital signal | - |
| E2 | #17 | Signal ground, sound | Ulow | - |
| E3 | #18 | 15 supply | Ubat | - |
| E4 | #19 | Data signal to audio unit | Digital signal | - |
| E5 | #20 | Busy signal to audio unit | Digital signal | - |
| E6 | #21 | Left audio channel | Alternating current when there is sound to the loudspeaker | - |
| E7 | #22 | Right audio channel | Alternating current when there is sound to the loudspeaker | - |
| E8 | #23 | Voice guide channel | Alternating current when there is sound to the loudspeaker | - |
| H | Screen ground, cable to audio unit | Ulow | - |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.